Question

do these problems in your head. use paper only for the problems that you just cant d do as many of these problems without paper as you can. do not use a calculator at all. 5 + 39 = 780 + 20 = 96 + 80 = 2700 + 300 = 10,000 + 99,000 = 0.7 + 4.8 = 5.0 + 7.8 = 0.05 + 0.55 = 0.81 + 0.8 =

Explanation:

Step1: Add whole numbers (1)

$5 + 39 = 44$

Step2: Add whole numbers (2)

$780 + 20 = 800$

Step3: Add whole numbers (3)

$96 + 80 = 176$

Step4: Add whole numbers (4)

$2700 + 300 = 3000$

Step5: Add whole numbers (5)

$10,000 + 99,000 = 109,000$

Step6: Add decimals (1)

$0.7 + 4.8 = 5.5$

Step7: Add decimals (2)

$5.0 + 7.8 = 12.8$

Step8: Add decimals (3)

$0.05 + 0.55 = 0.60$

Step9: Add decimals (4)

$0.81 + 0.8 = 1.61$

Answer:

$5 + 39 = 44$
$780 + 20 = 800$
$96 + 80 = 176$
$2700 + 300 = 3000$
$10,000 + 99,000 = 109,000$
$0.7 + 4.8 = 5.5$
$5.0 + 7.8 = 12.8$
$0.05 + 0.55 = 0.60$
$0.81 + 0.8 = 1.61$