脱式计算能简便的要简便328×78+660070
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发布时间:2024-09-30 09:50
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时间:2024-10-23 10:33
(1)35×(624-579)
=35×45
=1575;
(2)256-78-122
=256-(78+122)
=256-200
=56;
(3)25×99×40
=25×40×99
=1000×99
=99000;
(4)748+2436+152
=748+152+2436
=900+2436
=3336;
(5)720÷16÷5
=720÷(16×5)
=720÷80
=9;
(6)125×32
=125×8×4
=1000×4
=4000.