3
$9.2 - 1.8 =$ $5.6 + 2.4 =$ $0.45 - 0.36 =$
$7.2 - 2.9 =$ $2 - 0.1 =$ $3.76 + 2.3 =$
$6.3 - 2.8 =$ $0.13 + 0.84 =$ $4.6 + 3.61 =$
$7.3 + 1.8 =$ $0.32 + 0.58 =$ $7.9 - 4.71 =$
$6.5 - 2.7 =$ $0.24 + 0.75 =$ $0.48 + 0.35 =$
$9.4 - 7.6 =$ $5.6 - 1.8 =$ $5 - 3.5 =$

1. $9.2 - 1.8 = 7.4$
2. $5.6 + 2.4 = 8$
3. $0.45 - 0.36 = 0.09$
4. $7.2 - 2.9 = 4.3$
5. $2 - 0.1 = 1.9$
6. $3.76 + 2.3 = 6.06$
7. $6.3 - 2.8 = 3.5$
8. $0.13 + 0.84 = 0.97$
9. $4.6 + 3.61 = 8.21$
10. $7.3 + 1.8 = 9.1$
11. $0.32 + 0.58 = 0.9$
12. $7.9 - 4.71 = 3.19$
13. $6.5 - 2.7 = 3.8$
14. $0.24 + 0.75 = 0.99$
15. $0.48 + 0.35 = 0.83$
16. $9.4 - 7.6 = 1.8$
17. $5.6 - 1.8 = 3.8$
18. $5 - 3.5 = 1.5$

怎么简便怎么算
$51 + 27 + 73$ $45 × 37 + 63 × 45$ $364 + 198 - 164$
$25 × 24$ $598 - (98 + 150)$ $58 × 101$
$138 × 27 - 27 × 38$ $125 × 88$ $118 × 23 + 23 × 82$
$86 + (73 + 14)$ $48 × 6 + 6 × 52$ $(4 × 135) × 25$
时间()
评价

$51 + 27 + 73$
$=51+(27+73)$
$=51+100$
$=151$
$45×37 + 63×45$
$=45×(37 + 63)$
$=45×100$
$=4500$
$364 + 198 - 164$
$=(364-164)+198$
$=200+198$
$=398$
$25×24$
$=25×4×6$
$=100×6$
$=600$
$598-(98 + 150)$
$=(598-98)-150$
$=500-150$
$=350$
$58×101$
$=58×(100+1)$
$=58×100+58×1$
$=5800+58$
$=5858$
$138×27 - 27×38$
$=27×(138 - 38)$
$=27×100$
$=2700$
$125×88$
$=125×8×11$
$=1000×11$
$=11000$
$118×23 + 23×82$
$=23×(118 + 82)$
$=23×200$
$=4600$
$86+(73 + 14)$
$=(86+14)+73$
$=100+73$
$=173$
$48×6 + 6×52$
$=6×(48 + 52)$
$=6×100$
$=600$
$(4×135)×25$
$=4×25×135$
$=100×135$
$=13500$