0.6×47+52× +60% | 5.72-1.84-1.16 | 7 ×6 +2 ×6 . |
+60%,=0.6×47+52×0.6+0.6,
=0.6×(47+52+1),
=0.6×100,
=60;
(2)5.72-1.84-1.16,
=5.72-(1.84+1.16),
=5.72-3,
=2.72;
(3)7
×6
+2
×6
,=(7
+2
)×6
,=10×6.4,
=64.
分析:(1)(3)根据数字特点,运用乘法分配律简算;
(3)运用减法的性质简算.
点评:完成此题,注意分析式中数据,运用恰当的运算定律或性质简算.