问题 填空题
用简便方法计算.
(4+10)×25
36×57+64×5717×39+17×3134×301
答案

(1)(4+10)×25

=4×25+10×25

=100+250

=350;

(2)36×57+64×57

=(36+64)×57

=100×57

=5700;

(3)17×39+17×31

=17×(39+31)

=17×70

=1190;

(4)34×301

=34×300+34×1

=10200+34

=10234.

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