怎样简便就怎样算.①400-(1300÷65+35)②29+29×29③15×(41-17)÷30④19×96+962÷74⑤25×44⑥355+260+140+245⑦50×25×20×40⑧645

题目简介

怎样简便就怎样算.①400-(1300÷65+35)②29+29×29③15×(41-17)÷30④19×96+962÷74⑤25×44⑥355+260+140+245⑦50×25×20×40⑧645

题目详情

怎样简便就怎样算.
①400-(1300÷65+35)

②29+29×29

③15×(41-17)÷30

④19×96+962÷74
⑤25×44⑥355+260+140+245⑦50×25×20×40⑧645-180-245.
题型:解答题难度:中档来源:不详

答案

①400-(1300÷65+35),
=400-(20+35),
=400-55,
=345;

②29+29×29,
=(1+29)×29,
=30×29,
=870;

③15×(41-17)÷30,
=15×24÷30,
=360÷30,
=12;

④19×96+962÷74,
=1824+13,
=1837;

⑤25×44,
=25×(4×11),
=25×4×11,
=100×11,
=1100;

⑥355+260+140+245,
=(355+245)+(260+140),
=600+400,
=1000;

⑦50×25×20×40,
=(50×20)×(25×40),
=1000×1000,
=1000000;

⑧645-180-245,
=645-245-180,
=400-180,
=220.

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