① × = ②24× = ③3× = ④1﹣ =
⑤ ÷2= ⑥2÷ = ⑦ ÷ = ⑧0÷ =
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。
24×5=
91+199=
7.8+2.2=
5.3﹣2.7=
9÷0.1=
2.5×0.4=
+0.25=
× =
8.1÷0.03= +3= ×= ﹣=
×= 134﹣18= ×0÷3= 7.45+8.55=
= 2.4×5= = 0.32=
= = =
36× = 12× = × = ×3=
1÷ = ÷6= ÷ = 100÷10%=
9.56+1.34=
=
1÷0.25%=