①2.5×3.2×1.25
②101×9.25- 9.25
③4.8+1.2×3.2
④6.28×6.9 +0.31×62.8
6.4÷8= 2.5÷0.5= 0.48÷0.6= 0.21×3=
0.39÷1.3= 0.9×0.3= 4.39+2.1= 7÷100=
1÷0.25= 0.25×4÷2=
方法一:
12÷1.5
= 120÷15
=(120÷3)÷(15÷3)
=40÷5
=8
方法二:
=12÷3÷0.5
=4÷0.5
方法三:
=(12×2)÷(1.5×2)
=24÷3
请模仿以上其中的一种方法,照样子算一算“21÷3.5”。
0.25×8= 50%×0.4= 7÷7%= 23=
= 2.4×5= = 0.32=
= = =