Question

Jax and Jane comics arrangement is given below.
Jax’s arrangement: 3 Hundreds + 8 Tens + 9 Tens + 7 Ones
Jane's arrangement: 2 Hundreds + 6 Tens + 7 Tens + 8 Ones.
How many comics do they have in total?

• A. 715
• B. 815
• C. 805
• D. 725

Answer 1

The correct option is B 815

Jax’s arrangement: 3 Hundreds + 8 Tens + 9 Tens + 7 Ones
$=300+80+90+7$
$=300+170+7$
$=300+100+70+7$
$=400+70+7=477$

Jane's arrangement: 2 Hundreds + 6 Tens + 7 Tens + 8 Ones
$=200+60+70+8$
$=200+130+8$
$=200+100+30+8$
$=300+30+8=338$
$477+338=?$

Using the HTO table for decomposition:


$=700+100+15$
$=800+10+5=815$

So, there are 815 comics in total.