24+11= 1.2+0.4= 1- =
× = 1.8÷0.3= 2- =
+ = 3.6÷0.4= ×16=
54÷18= 0.375+ = 0÷ =
8.1÷9= ×15= × =
1.25×8= 0.8×31= + =
13.8-7= ÷9= ÷4=
0.5×0.6= ×12= 10-0.5=
0.25×0.8×4= 1- - = 1-3÷8=
5.6+2.3=
12﹣1.9=
-=
1.4÷0.2=
0.7×0.5=
4.18÷10=
0.25×4=
÷=
×=
1.25×0.8=
2.7×0.8×0=
×80=
60÷=
3.4﹣1.52=
0.25×44=
6.12+3.78=
35×=
0.25×24×4=
×+×=
①A同学说:计算80÷4时,可以先看成8÷4,就是8个十除以4,得到2个十,就是20。
②B同学说:计算0.8÷4时,可以先看成8÷4,就是8个0.1除以4,得到2个0.1,就是0.2。
请你思考:计算÷4时,可以怎样计算?请像上面两位同学一样描述计算过程。
在学习小数乘法时,我们是将小数转化成整数,再利用积的变化规律
请尝试用这种方法计算×的积。
+= ×= -= ÷=
0.18×= 4.7+0.38= 3.2÷0.1= (10﹣)×0=
204﹣78= 120×7= 960÷6=
3.8﹣2.98= + = ÷ =
18× = 3.5× = × =
5.6÷ = ÷4= ÷ =
① × = ②24× = ③3× = ④1﹣ =
⑤ ÷2= ⑥2÷ = ⑦ ÷ = ⑧0÷ =
36× = 12× = × = ×3=
1÷ = ÷6= ÷ = 100÷10%=