解这道算式:28−812+(−46)
已知: 28−812+(−46).
要求:解:28−812+(−46).
解答
28−812+(−46)
=28−812−46
=28−(812+46)
=28−(812+4×26×2)
=28−(812+812)
=28−(8+812)
=28−1612
=2×38×3−16×212×2
=624−3224
=6−3224
=−2624
=−13×212×2
=−1312
因此,28−812+(−46)=−1312
广告
已知: 28−812+(−46).
要求:解:28−812+(−46).
解答
28−812+(−46)
=28−812−46
=28−(812+46)
=28−(812+4×26×2)
=28−(812+812)
=28−(8+812)
=28−1612
=2×38×3−16×212×2
=624−3224
=6−3224
=−2624
=−13×212×2
=−1312
因此,28−812+(−46)=−1312