Simple calculation of 3.8 * 5.4 + 7.2 * 6.2 + 1.8 * 3.8

Simple calculation of 3.8 * 5.4 + 7.2 * 6.2 + 1.8 * 3.8


=3.8×5.4+1.8×3.8+7.2×6.2
=3.8×（5.4+1.8）+7.2×6.2
=3.8×7.2+7.2×6.2
=（3.8+6.2）×7.2
=10×7.2
=72



Can 4.6-2.8 + 6.4-7.2 be operated easily?


1



1 + 2 + 3 + 4 + 5 + 6 + 7 + 8... + 100. Remember there is a simple way


1+2+3+4+5+6+7+8...+100
＝﹙0＋100﹚＋﹙1＋99﹚＋﹙2＋98﹚＋…… ＋﹙48＋52﹚＋﹙49＋51﹚＋50
＝100×50＋50
＝101×50
＝5050.

Elden Ring Premiere

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