四年级下册简便运算大综合(分类)ppt课件.ppt

75+278+25,连加,95+308+5,28+（308+72）,28+308+72,75+（278+25）,95+（308+5）,108+29+71+62,108+29+（71+62）,连减,2574852,50011684,1007624,100050550,连 乘,1011258,251234,12578,250464,101（1258）,25（1234）,125（78）,250（464）,连 除,4025,8025,6025,5624,6065,4823,10025,7025,（200+8）25,乘法分配律,25（200+8）,（200+1）44,20144,35（100+2）,10235,87（100+3）,10387,82（1001）,8299,乘法分配律逆用,9331593215,8928+8972,108101108,19999+199,2731+3172+31,29145442929,乘法分配律逆用,372+9837,675+9567,75911759,261959526,2731+3172+31,29145442929,简便运算综合考试,75+278+25,2574852,1011258,4025,（200+1）44,372+9837,20144,75911759,261959526,2731+3172+31,结束,