四年级下册数学课件 整理与复习 用计算器计算 苏教版(共27张PPT)

课件27张PPT。整理与复习（5）用计算器计算1121123211234321123454321123456543211428572857428571428714285857142141411572899×99= 999×999= 9999×9999= 98019980019998000199999×99999= 999999×999999= 9999999×9999999= 9999800001999998000001999999800000017641－146761747641－14676174245775422457－＝50858550558－＝799299722799－＝717377311377－＝635465433456－＝30878730378－＝835285322358－＝617476411467－＝6174617419998299973999612123123412345123456123456712345678123456789142857285714428571571428714285857142142857285714428571571428714285857142999999999999999999999999999999999999=80=880=8880=88880=100=1100=11100=111100=100=1000=10000=100000=1=22=333=4444=80=880=88808888098765× 9 －5= 888880987654× 9 －6= 88888809876543× 9 －7 = 8888888098765432× 9 －8 = 888888880=100=1100=11100=111100123456×9－4 = 11111001234567×9－3 = 1111110012345678× 9－2 = 111111100123456789× 9－1 = 1111111100=100=1000=10000=100000111115+ 98765×9 = 10000001111114+ 987654×9 = 1000000011111113+9876543×9 = 100000000111111112+98765432×9 = 1000000000=1=22=333=4444(500000- 5 ) ÷9 = (6000000- 6 ) ÷9 = (70000000- 7) ÷ 9 = (800000000-8) ÷9 = 555556666667777777888888884、张叔叔在购物中心买了右边发票中所列的物品，请你用计算器算一算，张叔叔带了3000元钱，够不够？2 36 57 21 2 54 3 22 99 4贰玖玖肆零零7+8+9+14+15+16+21+22+23=135135÷15=9方框中9个数的和是方框正中间的一个数的9倍153÷9=178+14+15+16+22=7575÷15=5方框中5个数的和是方框正中间的一个数的5倍120÷5=2455120,5