Question

Use properties to find the sum or product.1. 6 X 892. 93 +(68 +7)3. 5 X 23 X 24. 8 X 51 5. 34 + 0 + 18+ 26 6. 6 X 107

Answer 1

3. We want to solve using properties;

$\begin{gathered} 5\times23\times2 \\ =5\times2\times23 \\ =5\times2\times(20+3) \\ =10\times(20+3) \\ =(10\times20)+(10\times3) \\ =200+30 \\ =230 \end{gathered}$

It simply involve trying to reduce numbers to their simpliest form to make multiplication and addition easy without using calculator.

like; 21=20+1, 39=40-1 etc.

4. Given;

$\begin{gathered} 8\times51 \\ =8\times(50+1) \\ =8\times50+8\times1 \\ =400+8 \\ =408 \end{gathered}$