预约小初高体验课 享受1对1辅导
各位家长请注意:此表单用于预约体验课,不想预约的家长,请勿填写
331.
1.4×99+1.4
=1.4× (99+1 ) .
=1.4×100
=140
332.
2.5×12.5×32
=2.5×12.5× (8×4)
=(2.5×4)× (12.5×8)
=10× 100
=1000
333.
42× 67+4.2× 330
=42× 67+42× 33
=42× (67+33 )
=42× 100
=4200
8.37×16+ 8
=8.37× (16+8)
=8.37×2
=16.74
334.
28.7÷0.35
=28.7÷ (0. 7×0.5)
=28.7÷0.7÷0.5
=41÷0.5
=82.
335.
310+ 2.5+4
=310+(2. 5× 4)
=310÷ 10
=31
336.
11.2+ 9.6×2.4
=11.2+(9.6+2.4)
=11.2+4
=2.8
337.
560+ (140- 8)
=560- 140× 8
=4× 8
=32.
338.
5.6×7÷4
=5.6+4×7
=1.4× 7
=9.8
339.
91 ÷0.125
=(91×8) ÷ (0. 125× 8)
=728÷1
=728
340.
2.38×4. 1+5. 8×2.38+0. 238
=2.38×4. 1+5.8×2.38+2.38×0. 1
=2.38×(4.1+5.8+0.1)
=2.38× 10
=23.8