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Unit 5 · Tambah dan Tolak Wang
Unit 5

Tambah dan Tolak Wang

Kedai Kek Mesra mendapat hasil jualan RM38 260 pada bulan Jun dan RM17 845.50 pada bulan Julai.
Kedai itu membayar RM49 312.80 kepada pembekal tepung dan mentega.
Berapakah wang yang tinggal?

Tambah dan Tolak Wang
加减混合 = tambah dan tolak 蛋糕店两个月的营业收入要先合起来,再减去付给供应商的钱,所以一道算式里有加也有减。加减混合的算式要从左到右,一步一步地算。每一步都要对齐小数点,整数金额补点零零。 例子:RM500 + RM300 − RM200 = RM800 − RM200 = RM600。 注意:不要跳着先算后面的减法。
adding and subtracting = tambah dan tolak The cake shop's sales for two months are put together first, then the payment to the supplier is subtracted, so one number sentence has both + and −. Work from left to right, one step at a time, lining up the decimal points and writing .00 for whole ringgit. Example: RM500 + RM300 − RM200 = RM800 − RM200 = RM600. Watch out: do not jump ahead to the subtraction.
Dari kiri ke kanan

Tambah dahulu, kemudian tolak

RM38 260 + RM17 845.50 − RM49 312.80

Langkah 1

RM38260.00
+RM17845.50
RM56105.50

Langkah 2

RM56105.50
−RM49312.80
RM6792.70
Baki = RM6 792.70
从左到右 = dari kiri ke kanan 第一步先加:三万八千二百六十补成点零零,加一万七千八百四十五令吉五十仙,得五万六千一百零五令吉五十仙。第二步再减:减去四万九千三百一十二令吉八十仙,仙不够减时把一令吉换成一百仙,最后剩六千七百九十二令吉七十仙。 例子:RM1 000 + RM250.50 − RM600 = RM650.50。 注意:第一步的答案就是第二步的第一个数。
from left to right = dari kiri ke kanan Step 1, add: RM38 260.00 + RM17 845.50 = RM56 105.50. Step 2, subtract: RM56 105.50 − RM49 312.80 = RM6 792.70, changing RM1 into 100 sen where needed. Example: RM1 000 + RM250.50 − RM600 = RM650.50. Watch out: the answer to step 1 is the first number in step 2.
Tolak dahulu

Tukar susunan: jawapan sama?

RM54 190 − RM682.35 + RM7 426.40

Langkah 1

RM54190.00
−RM682.35
RM53507.65

Langkah 2

RM53507.65
+RM7426.40
RM60934.05
= RM60 934.05
RM7 426.40 − RM682.35 + RM54 190 = RM60 934.05 ✔
先减后加 = tolak dahulu, kemudian tambah 从左到右:五万四千一百九十减六百八十二令吉三十五仙,得五万三千五百零七令吉六十五仙;再加七千四百二十六令吉四十仙,得六万零九百三十四令吉零五仙。如果把次序换成七千四百二十六令吉四十仙减六百八十二令吉三十五仙再加五万四千一百九十,每个数都带着它前面的符号一起搬,答案还是一样。 例子:RM90 − RM20 + RM10 = RM10 + RM90 − RM20 = RM80,每一步都不会出现不够减的情况。 注意:符号要跟着数一起搬,不能把减的数变成加。
subtract first, then add = tolak dahulu, kemudian tambah Left to right: RM54 190 − RM682.35 = RM53 507.65, then + RM7 426.40 = RM60 934.05. If the order is changed but every amount keeps its own sign, as in RM7 426.40 − RM682.35 + RM54 190, the answer is the same. Example: RM90 − RM20 + RM10 = RM10 + RM90 − RM20 = RM80, and no step ever takes away more than is there. Watch out: each sign moves with its number; an amount being subtracted must stay subtracted.
Nilai yang tidak diketahui

RM31 405.70 + RM28 612.40 − □ = RM20 356.85

Cara: kira bahagian yang diketahui dahulu

Langkah 1

RM31405.70
+RM28612.40
RM60018.10

Langkah 2: □

RM60018.10
−RM20356.85
RM39661.25
□ = RM39 661.25
混合运算求未知数 = anu dalam tambah dan tolak 方法一:用小的数想一想,例如七加五减□等于三,□就是十二减三,所以要用“前面的和减去答案”。方法二:先把已知的两个金额加起来,得六万零一十八令吉十仙;□是被减去的数,所以用这个和减去两万零三百五十六令吉八十五仙,得三万九千六百六十一令吉二十五仙。 例子:RM600 + RM400 − □ = RM200 → □ = RM800。 注意:最后把□放回算式检查一次。方法二也可以用电子表格来算,下一屏会看到。
the unknown in a mixed sentence = anu dalam tambah dan tolak Method 1: think with small numbers, e.g. 7 + 5 − □ = 3 gives □ = 12 − 3, so □ is the sum minus the answer. Method 2: add the two known amounts to get RM60 018.10; □ is being taken away, so □ = RM60 018.10 − RM20 356.85 = RM39 661.25. Example: RM600 + RM400 − □ = RM200, so □ = RM800. Watch out: put □ back into the sentence to check.
Cara 2

Guna hamparan elektronik

B3 =B1+B2 · D3 =D1−D2

ABCD
1Wang 131405.70Jumlah60018.10
2Wang 228612.40Baki20356.85
3Jumlah=B1+B2□=D1-D2
B3 → RM60 018.10 · D3 → RM39 661.25
电子表格 = hamparan elektronik 方法二是用电脑的电子表格(例如 MS Excel)来算。把两个金额打在 B1 和 B2,在 B3 打上等号开头的公式“=B1+B2”,电脑就会算出六万零一十八令吉十仙。再把这个和放在 D1,把答案两万零三百五十六令吉八十五仙放在 D2,在 D3 打“=D1-D2”,就得到方框的值三万九千六百六十一令吉二十五仙。 例子:B1 打 500,B2 打 300,B3 打 =B1+B2,会显示 800。 注意:公式一定要用等号开头,否则电脑只会把它当成文字。
spreadsheet = hamparan elektronik Method 2 uses a spreadsheet such as MS Excel. Type the two amounts in B1 and B2, then type the formula =B1+B2 in B3 and the computer shows RM60 018.10. Put that total in D1 and the answer RM20 356.85 in D2, then type =D1-D2 in D3 to get the box, RM39 661.25. Example: type 500 in B1 and 300 in B2; =B1+B2 in B3 shows 800. Watch out: a formula must start with an equals sign, or the computer treats it as plain text.
Semak cepat

RM8 347 + RM5 719 − RM2 908 = ?

从左到右 = dari kiri ke kanan 这道算式先有加号、后有减号,按从左到右的规则,先把前面两个金额加起来,再用得到的和减去最后的金额。两步都用竖式,对齐数位,注意进位和借位。 例子:RM300 + RM500 − RM100,先得 RM800,再得 RM700。 注意:减号后面的金额是要拿走的,不能把它也加进去。
left to right = dari kiri ke kanan The plus sign comes before the minus sign, so working left to right you add the first two amounts, then subtract the last amount from that sum. Use columns for both steps and watch the carrying and borrowing. Example: RM300 + RM500 − RM100; first RM800, then RM700. Watch out: the amount after the minus sign is taken away; do not add it as well.
Semak cepat

RM64 000 − RM9 275.60 + RM3 481.25 = ?

先减后加 = tolak dahulu 这道算式先有减号,所以第一步是用最前面的整数金额减去带仙的金额,要先补点零零,再一路借位。第二步把得到的差加上最后的金额。 例子:RM1 000 − RM400 + RM150,先得 RM600,再得 RM750。 注意:不可以先把后面两个金额加起来再减,那样等于把要加的钱也减掉了。
subtract first = tolak dahulu The minus sign comes first, so step 1 takes the amount with sen away from the whole-ringgit amount: write .00 and borrow along. Step 2 adds the last amount to that difference. Example: RM1 000 − RM400 + RM150; first RM600, then RM750. Watch out: do not add the last two amounts first and then subtract; that takes away money that should be added.
Ringkasan

Syabas!

+ −

Kira dari kiri ke kanan, satu langkah demi satu langkah.

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