Adding and Subtracting Decimals: math test, Grade 5 – download the PDF

1 Estimate, then calculate / 4 pts

Round each number to the nearest whole number to estimate, then calculate the exact answer.

1. \(18.7 + 6.35\)
2. \(14.2 - 5.86\)

2 Vertical calculations / 4 pts

Calculate in columns, with the decimal points lined up.

1. \(29.64 + 7.9\)
2. \(3.47 + 12.8 + 0.05\)
3. \(50 - 23.46\)
4. \(8.2 - 3.77\)

3 Find the error / 3 pts

Tara wrote \(5.4 + 2.38 = 2.92\). (a) Explain her mistake. (b) Find the correct sum. (c) Show how an estimate reveals the error.

4 Missing numbers / 3 pts

(a) Find the missing number in \(9.35 + \_\_ = 12.1\). (b) Find the missing number in \(\_\_ - 6.48 = 3.5\). (c) Which is greater: \(4.6 + 3.75\) or \(9.1 - 0.8\)?

5 At the market / 3 pts

Jada buys apples for $4.85, bread for $3.20 and cheese for $6.90. She pays with a $20 bill. (a) Find the total. (b) Find her change. (c) Can she buy a juice that costs $5.25 with that change? Explain.

6 Hiking trail / 3 pts

A trail has three sections of 2.65 km, 1.8 km and 3.45 km. A group has already walked 4.9 km. (a) How long is the whole trail? (b) How far is left? (c) The group walks 1.25 km more. How far is left now?