直接写出得数:÷
×
÷
= 1﹣1×
= 5﹣1.4﹣1.06= 92+33= 0.68+
+0.32=
630×9%= 0×÷
= (
﹣
﹣
)×12=
÷
= 2﹣
﹣
=
简便计算
①4.05﹣2.86﹣0.14
②7×
+0.4×7
③2.25×3.14×4+3.14
④(﹣
)×17×15.
简算
0.45×201 1.6×55.4﹣55.4×0.6 5.8+2.49+8.51+4.21.25×0.32×2.5.
计算下面各题,能简算的要简算
1243﹣1334÷23×122×3.14×8×5+3.14×828.86﹣5.29﹣1.71﹣1.86+(1﹣
)×
÷
85×0.75+16×75%﹣
.
1998÷1998199819981431×23+2331×17+31
25:6=x:4.55(x﹣4)﹣6=2(x﹣4)
简算:
①57.5﹣14.25﹣15②102.31×59
③(×10.68+8.52×
)÷1
④0.1+0.2+0.3+0.4+…+0.9+0.1+0.11+0.12+…+0.98+0.99.