\(\begin{array}{*{20}{c}}{a)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{435}\\{352}\end{array}}\\\hline{\,\,\,787}\end{array}\)                           \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{236}\\{528}\end{array}}\\\hline{\,\,\,\,764}\end{array}\)                            \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{354}\\{\,\,\,63}\end{array}}\\\hline{\,\,\,\,417}\end{array}\)

\(\begin{array}{*{20}{c}}{b)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{569}\\{426}\end{array}}\\\hline{\,\,\,\,143}\end{array}\)                     \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{753}\\{236}\end{array}}\\\hline{\,\,\,517}\end{array}\)                             \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{880}\\{\,\,54}\end{array}}\\\hline{\,\,\,826}\end{array}\)

\(\text{a, 54 + (- 37 + 10 - 54 + 67)}.\)

\(=54-37+10-54+67=\left(54+54\right)+\left(-37+67\right)+10=30+10=40.\)

\(\text{b, - 2021 + (- 569) + (- 201) + (+ 469) + 301}.\)

\(=-2021-569-201+469+301=-2021+\left(-569+469\right)+\left(-201+301\right)=-2021-100+100=-2021.\)

|5+6+9+7+3+8+5+4+72+569+45555+535+45555+78982+45|*|123+(7-130)|

=|5+6+9+7+3+8+5+4+72+569+45555+535+45555+78982+45|*|123-123|

=0

**************nha

tính:65+123+569=757 nha Alexander Sky Sơn Tùng MTP

a)  5 69 : 5 67 - 3 40 : 3 39  = 5 2 - 3 1  = 25 – 3 = 22

`@` `\text {Ans}`

`\downarrow`

`(7432+1569)-(2432+569)`

`= 7432+1569-2432-569`

`= (7432 - 2432) + (1569 - 569)`

`= 5000 + 1000`

`= 6000`

`@` `yHG.`

cảm ơn nha

Hướng dẫn giải:

Khoanh vào B. 856 569

Em tiến hành chuyển que tính để tạo thành số: 20 568

hình lấy ở đâu vậy bạn?