问题
解答题
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答案
(1)7.26×1.4+12.74×1.4
=(7.26+2.74)×1.4
=10×1.4
=14;
(2)1.25×2.5×32
=1.25×2.5×8×4
=(1.25×8)×(2.5×4)
=10×10
=100;
(3)6.8×10.2
=6.8×(10+0.2)
=68+1.36
=69.36;
(4)14.9×2.17-4.9×2.17
=(14.9-4.9)×2.17
=10×2.17
=21.7;
(5)8.8×0.125
=(8+0.8)×0.125
=8×0.125+0.8×0.125
=1+0.1
=1.1;
(6)36×9.9
=36×(10-0.1)
=36×10-36×0.1
=360-3.6
=356.4.