直接写出下面各题的得数.
43+96= 10﹣4.7= 3.5÷40= ÷
=
÷5.25=
+6.25= 0.74×100= 1÷
=
×5+
×8= 15×(
+
)=
看谁算得准.
4.2﹣1.38+5.8﹣3.62 20112﹣2011×20101﹣(﹣
)×3
4×0.8×2.5×1.25(+
)×
〔(
+
)÷
〕×
.
用简便方法计算.
①45×9.9;
②4.82×88+48.2×1.2;
③4.2×102﹣8.4;
④7.86﹣(5.63﹣0.86)﹣1.37.
用你喜欢的方法计算.
2.5×(1.9+1.9+1.9+1.9)(+
﹣
)×4×9 3.64÷4+4.36×25%+200%
脱式计算,能简算的要简算.
1.21×42﹣(4.46+0.14) 371×100.1 4.44×25
(0.75+0.2)÷0.25×250% 2006×2006﹣2005×2005.
计算,能简算的要简算.
43××
+
÷
2﹣
÷
﹣
+
÷
÷
×0.64(0.75﹣
)×(
+
)