8.99+0.1=
1﹣
=
5﹣5÷2.5=
0、5×2.4=
0.1÷0.01=
0.43×(2.7+7.3)=
1.206×0.8≈(得数用四舍五入法凑整到百分位)
2998÷31≈(估算)
口算部分.
40×25%= 7.9+2.01= 16÷1%= 32×0.125=
÷
= 5÷
=
×100=
×
=
直接写出得数:
9.9+9.1= ; 0.1÷0.02= ;
3.14×10%= ; 7﹣7÷9= 6
;
×
= ;
÷
= ;
5÷
﹣
÷5= 5
; 0.42÷
= ;
12.5﹣2.5×4= ; 2÷0.1×0.01= ;
0÷
= ; 2﹣
= .
直接写出得数.
159﹣30= 2+2.5= 1÷
= 6×(
﹣0.25)=
4×0.36×5=
×3÷3×
=(
﹣
)×12= 45×99=
直接写出得数:
3.6÷0.12= 4﹣
= 45×101= 2×32=
3÷0.75= 10÷0.1﹣0.1= 2÷3×
=
﹣
+0.4﹣
=
直接写出得数.
0.6÷0.2= 6﹣0.4= 8×0.1= 4.5×0.4=
=
=
=
÷
=
= 526+298= 302×39≈ 642÷80≈