口算:
3.14×2= 3.14×3= 3.14×4= 3.14×5= 3.14×6=
3.14×7= 3.14×8= 3.14×9= 3.14×2.7=+
=
4+= 2﹣
=
×
= 6÷
=
÷5=
×
=
﹣
= 3.14×2+3.14×0.7= + = .
0.6×0.7= 2.4×5= 0.5×7.6= 40×0.45= 0.8×0.4=
4.5×5= 3﹣0.54= 0.6×11= 2.4+4.8= 0.45×1000=
0.7÷100= 1×3.12= 12.7+4.3= 0.54﹣0.24= 1.25×80=
3.6+0.45= 2.5×2.4×0.4=5﹣0.27﹣1.73= 2.8+3.45+1.2= 0.35+99×0.35=
12×0.6= 4.5÷=
﹣
= 28×20%=
1.6×= 1÷
= 36×
= 15÷
=
直接填得数:×
= ;
÷3= ;
﹣
= ;(
+
)×56= ;
1÷×1÷
= ; 20×
= ;
÷
= ;
×
= ;
1÷(1÷9)= ;(﹣
)÷3= .
列式计算.÷
×
.