1 小数乘法
先计算,然后在○里填上“>”“<”或“=”,观察这些题的规律,再写出一个含此规律的等式.
(1)9.6×2.53=
6.9×3.52=
9.6×2.53○6.9×3.52
(2)3.9×6.82=
9.3×2.86=
3.9×6.82○9.3×2.86
(3)4.2×3.96=
2.4×6.93=
4.2×3.96○2.4×6.93
(4) .
2.3×0.3= 0.42×0.2= 3.5×0.2=
12×0.2= 1.8×0.5= 0.9×0.11=
1.22×0.4= 0.12×0.6= 0.02×500=
用“>”“<”“=”填空.
8.5×1.6 8.5×1.5
1.05×0.8 1×0.8+0.5×0.8
(5.6+4.4)×1.78 5.6×1.79+4.4×1.78
0.738×999+0.738 0.738×1000.
用“>”“<”或“=”填空.
7.6×5 0.76×50 3.8×2 2.8×3
6.3×2 2.1×6 6.7×5 0.76×10
35.2×3 3.52×3 2.35×100 2350÷100.
我会填.
(1)1.2×6= + + + + + .
(2)5.24×6的积有 位小数.
(3)根据l3×27=351,写出下面各题的积.0.13×27= ,13×2.7= 1.3×27=
(4)在一道乘法算式里,一个因数扩大100倍,另一个因数不变,积 .
6.7×1.2○1.2 3.7×0.65○3.7
4.2×0.6○4.2 0.8×1.4○0.8
3.85×9.5○3.85 9.4×2.5○9.4
0.9×0.9○0.95 5.43×0○5.43
3.5×5.3○5.3×3.5 4.8×0.999○4.8×1.01
1×0.95○0×1.22.
口算.
2.5×0.6×0.4= 1.25×0.7×0.8=
0.1×0.2×0.3= 5.4﹣0.4×5=
0.26×0.2×50= 0.5×0.75×4=
12.5×0.1×0.8= 0.4×0.1×0.25=