( ﹣ )×15 4×0.8×2.5×12.5 57×99+57
9.6﹣1.46﹣0.54 897÷25÷4 5.8×4.7+4.2×4.7.
1-0.01= 1.41-0.40= 0.4+0.6=
3.4+0.62= 8.04-3.84= 5-0.3-0.2=
18.5-13.5+1= 0.63+1.8+0.37= 12.37+9.13=
①46×101-46
②254-36+145-44
③0.72+2.8+1.28+7.2
④33.45-(3.45+9.72)
⑤125×32×25
⑥1400÷25÷4
12×8×125=12×(×)
6.2+17.9+3.8=(+)+17.9
42×11+11×58=(+)×
50.27-6.03-1.97=50.27-(+)
①2.8+ +7.2+
②9 ×4.25+ ÷6
③2.5×3.2×1.25
④75.3×99+75.3
⑤23.46﹣6.57﹣3.43
⑥ ×8.3﹣0.3×62.5%
①125×37×8
②99×76+76
③9800÷25÷4
④23.84+2.65+6.16+7.35
⑤32×[(128-53)÷25]