问题 解答题
怎样简便就怎样算;
49×99+49
168-52-48
125×881300÷25÷4
156×l0l-15699×45
37+125+63+17599×56+56-46
2688-534+348×(29×l25)
答案

(1)49×99+49

=49×(99+1)

=49×100

=4900;

(2)168-52-48

=168-(52+48)

=168-100

=68;

(3)125×88

=125×8×11

=1000×11

=11000;

(4)1300÷25÷4

=1300÷(25×4)

=1300÷100

=13;

(5)156×l0l-156

=156×(l0l-1)

=156×100

=15600;

(6)99×45

=(100-1)×45

=100×45-1×45

=4500-45

=4455;

(7)37+125+63+175

=(37+63)+(125+175)

=100+300

=400;

(8)99×56+56-46

=(99+1)×56-46

=100×56-46

=5600-46

=5554;

(9)2688-534+34

=2688-(534-34)

=2688-500

=2188;

(10)8×(29×l25)

=(8×125)×29

=1000×29

=29000.

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