99×222+333×334 75×45+17×25要简算

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99×222+333×334 75×45+17×25要简算

99×222+333×334 75×45+17×25要简算
99×222+333×334 75×45+17×25
要简算

99×222+333×334 75×45+17×25要简算
999*222+333*334
=333*3*222+333*334
=333*(666+334)
=333*1000
=333000
75*45+17*25
=75*28+75*17+25*17
=25*3*4*7+17*(75+25)
=100*21+ 17*100
=2100+1700
=3800

99×222+333×334
=111×2×3×33+333×334=333×(66+334)
=333×400=133200
75×45+17*25
=75×28+75×17+25*17
=25×3×4×7+17×(75+25)
=100×21+ 17×100
=2100+1700
=3800

999*222+333*334
=333*3*222+333*334
=333*(666+334)
=333*1000
=333000
75*45+17*25
=75*28+75*17+25*17
=25*3*4*7+17*(75+25)
=100*21+ 17*100
=2100+1700
=3800 一定要采纳!!!