题目内容
混合运算(能简便的一定要简便)(18%)
4.58+3.38+(5.48+6.62)
0.25×32×0.125
73.75-(4.3+8.75)
4.2×0.75+0.75×5.8
0.98×99+0.98
6.38÷0.05÷20.
4.58+3.38+(5.48+6.62)
0.25×32×0.125
73.75-(4.3+8.75)
4.2×0.75+0.75×5.8
0.98×99+0.98
6.38÷0.05÷20.
(1)4.58+3.38+(5.48+6.62)
=4.58+5.48+(3.38+6.62),
=10.06+10,
=20.06;
(2)0.25×32×0.125
=(0.25×4)×(8×0.125),
=1×1,
=1;
(3)73.75-(4.3+8.75)
=73.75-8.75-4.3,
=65-4.3,
=60.7;
(4)4.2×0.75+0.75×5.8
=(4.2+5.8)×0.75,
=10×0.75,
=7.5;
(5)0.98×99+0.98
=(99+1)×0.98,
=100×0.98,
=98;
(6)6.38÷0.05÷20
=6.38÷(0.05×20),
=6.38÷1,
=6.38.
=4.58+5.48+(3.38+6.62),
=10.06+10,
=20.06;
(2)0.25×32×0.125
=(0.25×4)×(8×0.125),
=1×1,
=1;
(3)73.75-(4.3+8.75)
=73.75-8.75-4.3,
=65-4.3,
=60.7;
(4)4.2×0.75+0.75×5.8
=(4.2+5.8)×0.75,
=10×0.75,
=7.5;
(5)0.98×99+0.98
=(99+1)×0.98,
=100×0.98,
=98;
(6)6.38÷0.05÷20
=6.38÷(0.05×20),
=6.38÷1,
=6.38.
练习册系列答案
相关题目