Question

六年级下册 数学 用简便方法计算下面各题

751-299 11.8*41-82*9/10

Answer 1

解：751-299
=751-（300-1）
=751-300+1
=451+1
=452
11.8×41-82×9/10
=（10+1.8）×41-41×2×9/10
=10×41+1.8×41-41×9/5
=410+1.8×41-41×1.8
410

Answer 2

751-299=751-300+1=452
11.8*41-82*9/10=5.9*82-82*0.9=82(5.9-0.9)=410

Answer 3

11.8*41-82*9/10=10*41+1.8*41-82*9/10=410+1.8*41-41*1.8=410

Answer 4

751-(300-1)
=751-300+1
=451+1
=452

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第二个呢

Answer 5

751-(300-1)
=751-300+1
=451+1
=452