394+137≈ 589-152≈ 446+297≈ 453-89≈
4.4+1.5=
3.1-1.1=
0.2+0.78=
9.8-5.6=
0.33+9.8=
0.6+0.7=
6.3-6.2=
4.3-2.5=
10.2+0.02=
9.2+6.8=
0.17+0.06=
0.15+0.7=
1.9+5.7=
1.02-0.09=
6.7+2.5=
8.8-6.9=
9-7.2=
10.2+0.2=
1-0.3=
0.17+0.6=
9.2-6.1=
3.6+1.5=
0.83-0.3=
8.5+5=
7.3+5.2=
3-1.7=
3.2-3.2=
3.1-0.9=
0.98-0.09=
3.7+2.3=
156+173□ 410-197□ 138+238□
522-115□ 109+205□ 425-168□
综合算式:
3×7= 63÷7=
30×7= 630÷7=
300×7= 6300÷7=
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)