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第57页

信息发布者：

+

75

×

5

×

4

25

×

40

+

25

×

4

×

100

-

73

×

2

=75+25+89

=100+89

=189

=123-23-96

=100-96

=4

=231-(68+32)

=231-100

=131

=457+300+2

=757+2

=759

=(84+16)+(57+43)

=100+100

=200

=100×24+3×24

=2400+72

=2472

=36×(4×5)

=36×20

=720

=36×(41+59)

=36×100

=3600

=25×4×12

=100×12

=1200

4×5×48=960(人)

答：去春游的学生一共有960人。

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