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6-83.

Johanna is planting tomatoes in the school garden this year. Tomato plants come in packs of six. She needs plants in the garden and already has . How many packs of plants will she need?

For each pack Johanna will gain more tomato plants, so multiply each pack by .
She already has tomato plants and she needs .

If she has plants, how many more does she need to have ?

Divide this number by and round up the nearest whole number of packs.