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用简便方法计算.127+30287×12+13×1225×24102×4548×101-48900÷25÷4

题目详情
用简便方法计算.
127+302              87×12+13×12               25×24
102×45               48×101-48                 900÷25÷4
▼优质解答
答案和解析
(1)127+302
=127+300+2
=427+2
=429

(2)87×12+13×12
=(87+13)×12
=100×12
=1200

(3)25×24
=25×4×6
=100×6
=600

(4)102×45
=(100+2)×45
=100×45+2×45
=4500+90
=4590

(5)48×101-48
=48×(101-1)
=48×100
=4800

(6)900÷25÷4
=900÷(25×4)
=900÷100
=9