57+(43+36)=(+)+36 a-b-c=a-(bc)
(45×25)×=45×(×4) 500÷25÷4=500÷(254)
①163×25+237×25
②384+98×25×4
③924+64×25-924
④365×99+365
⑤450÷9÷5
⑥3000÷125÷8
①3.67×99+3.67
②21÷2.5÷0.4
③4.64+5.36×2
④93.7×0.32+93.7×0.68
⑤0.125×32×0.25
⑥4.5×10.1
56×9956×100-1 352+201 352+200+1 402×21 8000
120-(87-5)120-87-5 720÷36÷2 720÷(36×2)
①(125-40)×8
②125×16×25
③5900÷4÷25
④187×45+45×13
⑤564+157+326
⑥15×[(710+590)÷13]
=144÷(□×□)
=
=
=
①45×37+55×37
②102×46
③11.29-3.6+8.71-6.4
④2100÷25÷4
⑤72×125
⑥960÷[4×(504-489)]
147+18+ 75.3-1.98-
47×65+65× 3000÷25÷
①475+390÷13-123
②270÷1.25÷0.8
③6.5÷ ×
④24×( + - )
⑤
⑥ ×47+52÷ +0.375