Question

1. $42.01 - $6.92 = ____ 6. 75.2 + 82.3 = ____ 7. \

$$\begin{align*} 1.509 \\\\ + 3.106 \\\\ \\hline \\end{align*}$$

1. \

$$\begin{align*} 8.059 \\\\ - 3.187 \\\\ \\hline \\end{align*}$$

1. \

$$\begin{align*} 3.872 \\\\ + 1.249 \\\\ \\hline \\end{align*}$$

round each decimal to the nearest ten. then add or subtract. 10. 23.78 + 10.45 = ____ 11. 83.69 - 55.41 = ____ 12. \

$$\begin{align*} 37.58 \\\\ - 21.25 \\\\ \\hline \\end{align*}$$

1. \

$$\begin{align*} 32.56 \\\\ + 6.7 \\\\ \\hline \\end{align*}$$

1. \

$$\begin{align*} 25.21 \\\\ - 12.47 \\\\ \\hline \\end{align*}$$

Explanation:

Step1: Round 252.78 to nearest ten

252.78 is between 250 and 260. The digit in ones place is 2, so round down to 250.

Step2: Round 102.45 to nearest ten

102.45 is between 100 and 110. The digit in ones place is 2, so round down to 100.

Step3: Add the rounded numbers

250 + 100 = 350

Answer:

350