问题
解答题
用最喜欢的方法计算. 12.5×38×0.8 (8.5-4)×(0.32÷1.6) 6.5×4.6+6.5×15 4
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答案
(1)12.5×38×0.8,
=12.5×0.8×38,
=10×38,
=380;
(2)(8.5-4)×(0.32÷1.6),
=4.5×0.2,
=0.9;
(3)6.5×4.6+6.5×15,
=6.5×(4.6+15),
=6.5×19.6,
=127.4;
(4)4
÷[9 8
+(1-3 4
)],1 8
=4
÷[9 8
+3 4
],7 8
=4
÷9 8
,13 8
=
.41 13