Question

27×31+31×72+31的梯等式计算

Answer 1

梯等式计算

解：
27x31+31x72+31
=27x31+31x72+31x1
=（27+72+1）x31
=100x31
=3100

Answer 2

27×31+31×72+31
=（27+72+1）x31
=100x31
=3100

Answer 3

27x31+31x72+31
=27x31+31x72+31x1
=（27+72+1）x31
=100x31
=3100

Answer 4

31*（27+72+1）=31*100=3100
27×31+31×72+31
＝（27＋72）x31＋31
＝（27+72+1）x31＝100x31＝3100

Answer 5

27×31+31×72+31
＝（27＋72）x31
＝31x27＋31x72
＝837＋2232
＝3069

追答

答错了

对不起

27×31+31×72+31
＝（27＋72）x31＋31
＝31x27＋31x72＋31
＝837＋2363
＝3100
＝

27×31+31×72+31
＝（27＋72）x31＋31
＝31x27＋31x72＋31
＝837＋2363
＝3100

＝

27×31+31×72+31
＝（27＋72）x31＋31
＝31x27＋31x72＋31。
＝837＋2363
＝3100