Question

Use properties to find the sum or product for 3x78

Answer 1

3 x 78

= 3 x (70+8)

= 210 + 24

= 234

Answer 2

`3*78\\-----------------\\78=70+8\\-------------------\\=3*(70+8)\\------------------------\\use\ distributive\ property:a(b+c)=ab+ac\\--------------------------\\=3*(70)+3*(8)=210+24=\huge\boxed{234}`