用梯等式计算38+160÷(40-30);156×l0l-156;67×12+67×35+67×52+67; &nbsp...

2025-03-17 14:01:27
推荐回答(1个)
回答1:

(1)38+160÷(40-30)
=38+160÷10
=38+16
=54;

(2)156×l0l-156
=156×(101-1)
=156×100
=15600;

(3)67×12+67×35+67×52+67
=67×(12+35+52+1)
=67×100
=6700;

(4)1+2+3+4+…+99+100
=(1+100)+(2+99)+…+(50+51)
=101×50
=5050.