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(1)72X20—3600÷90(2)0.32X76.4+2.36X3.2这两道题的简便算法!急求,坐等!

题目详情
(1)72X20—3600÷90 (2)0.32X76.4+2.36X3.2这两道题的简便算法!急求,坐等!
▼优质解答
答案和解析
(1)72X20—3600÷90
=(70+2)*20-40
=70*20+2*20+2*20=1400
(2)0.32X76.4+2.36X3.2
=0.32*76.4+23.6*0.32
=0.32*(76.4+23.6)
=0.32*100
=32