(1)4.05-1.96=2.09,
4.05
- 1.96
.
2.09
验算:
4.05
- 2.09
.
1.96
(2)0.65×0.48=0.312,
0.65
× 0.48
.
520
260
.
0.3120
(3)16÷23≈0.70
0.695
23
16 0
13 8
.
2 20
2 07
.
130
115
.
15
(1)4.05-1.96=2.09,
4.05
- 1.96
.
2.09
验算:
4.05
- 2.09
.
1.96
(2)0.65×0.48=0.312,
0.65
× 0.48
.
520
260
.
0.3120
(3)16÷23≈0.70
0.695
23
16 0
13 8
.
2 20
2 07
.
130
115
.
15