西师版三年级下册两位数乘两位数的乘法口算估算练习课件contents•两位数乘两位数的乘法口算方法•两位数乘两位数的乘法估算技巧•两位数乘...
..26+9=57-38=1500-700=42×2=99÷3=770÷7=660÷3=960÷3=180÷9=65+15=660÷6=800×2=50÷5=3×800=420÷7=3×220=480÷4=58+33=420-20=9...
五年级口算（一）姓名0.8×0.2=5.6×3=0.25×4=3.1×0.2=0.45×6=0.4×0.25=3.6×0.8=2.9×1=9.6×3=0.05×0.4=120×0.5=7.3×4=0.75×2=4....
