1、整数加减法110+660=480-20=680-44=280+40=570-220=90+770=120+60=590+70=390-80=980-560=440-110=120+530=980+120=670+210=550- 120=280+120=370-210=460+140=530-230=720-520=整数乘除法3208=2405=1205=4500=2505=1258=3033=40050=1502=9006=2580=12050=8019=30030=2008=3505=7005=6309=3602=31030=小数加减法1.2+2.8=3.6-1.6=4.12+5.18=0
2、.65-0.35=0.14+0.26=3.5+2.4=3.26-1.16=22.5+23=0.14+10.46=0.23+0.37=7.2-5.2=5.6+4.4=0.84+3.16=10.2+0.8=10.2-5.1=0.56+0.04= 3.78+0.22= 9.86-4.56=3.2-2=5.54-4.44=小数乘除法 .1.245=0.8 2.5=2.4 0.5=1.25 0.8=4.5 0.4=0.7 0.6=0.25 40=0.6 60=3.750.5=9.93=8.50.5=6.822=8.55=1.110.3=10.25=20.8=3.50.7=7.28=0.21 0.3=5.1 0.4=分数加减法3/4-1/2=1-1/8=11/12-1/6=1/5+1/4=1/2-1/3=5/6-1/3=3-5/6=3/4+1/5=3/4-1/5=5/6+2/9=5/6-2/9=2/3+3/5=2/3-3/5=6/7+1/2=2/3+1/6=1/3+1/4=1/3-1/4=1/5+1/7=1/5-1/7=1/4+1/9=
