÷ = ÷2= ( ﹣ )×42=
72×0.03+0.3×2.8 ÷+× 4.5÷÷
×48 -(4.375-) ÷(-0.375-)
①-÷-
②×+÷8
③(×27-)×
④÷[(+)×]
+= ×= -= ÷=
0.18×= 4.7+0.38= 3.2÷0.1= (10﹣)×0=
杯果汁有100mL,这杯果汁有多少 mL.? 聪聪是这样计算的:
从②→③,这一步运用的运算定律是,由此得出
1÷0.25= 15×60= 72×25%=
1.1-0.01= 12÷ =
24×( )=
289+69= 6.1-2.8= 0.01÷0.1= 3.5×1.6=
- = × = ÷ = 36×25%=
0.125×1.6×80= ( -0.4)×5=
186+24= 0.36÷0.2= 12-1.2= ﹣ =
0.8×0.5= 15÷ = ﹣0.375= 36×( + )=