Standard written form for addition I am learning

Standard written form for addition I am learning a standard method of doing an addition problem on paper when the numbers are too difficult to find the answer mentally. In your head Numbers are set out directly below each other. e. g. 347 + 265

There are 267 students in the junior school and 148 students in the senior school. How many students are there in total? 267 + 148 = ? Step 1: For our first example let’s expand each number and write them underneath each other. 100 10 200 + 60 + 7 + 100 + 40 + 8 400 + 10 + 5 Step 2: Add the ones together. 7 + 8 = 15. Fifteen is made up of a ten and a five. Write the 5 in the ones column and carry the 10 to the tens column. Step 3: Add the tens together. 10 + 60 + 40 = 110 is made up of one hundred and one ten. Write the 10 in the tens column and carry the 100 to the hundreds column. Step 4: Add the hundreds together. 100 + 200 + 100 = 400 Step 5: Add the bottom line together to get your answer. 400 + 10 + 5 = 415

Room 7 made 216 paper cranes at the start of the week and another 138 paper cranes at the end of the week. How many paper cranes have they made? 216 + 138 = ? Step 1: Now let’s try the same algorithm without expanding the number. 1 216 + 138 35 4 Step 2: Add the ones together. 6 + 8 = 14. Put the 4 in the ones column and carry the ten to the tens column. We will record this as a 1 above the tens column (e. g. it is one ten). Step 3: Add the tens together. 1 (ten) + 3 (tens) = 5 (tens) Record 5 tens in the tens column. Step 4: Add the hundreds together. 2 (hundreds) + 1 (hundred) = 3 (hundreds) You have now worked out the answer. 354

Now try these questions on your own. You will need to use pen and paper to record your algorithm. 1) 672 + 319 = ? 991 2) 438 + 247 = ? 685 3) 586 + 348 = ? 934 4) 261 + 179 = ? 440 5) 854 + 128 = ? 982 Click again when you have completed each question and the answer will be displayed. Need some more practise? Try Pg 59 of Teacher Tools Addition and Subtraction Book Numeracy resources